Also add in infantry defending villages and strongpoint's, and you have yet more rules and another mechanism. An initial draft of the rules had no infantry melee at all, (similar to PC), but that made it feel a little less Napoleonic, feedback from play testers was along the line of "what nothing for a column charge?" ) Therefore, by including just one possible result of melee, this created a reason for and created a particularly distinctive Napoleonic aspect to infantry charges. (Though, of course, this required more rules! )

IMHO, all the above are necessary to create that period "feel"; to make the rule set Napoleonic, as opposed to simply generic.